mobile video experience to vmos 4.0 methodology
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7/25/2019 Mobile Video Experience to VMOS 4.0 Methodology
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Mobile Video Experience
to
vMOS
4.0 Methodology
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7/25/2019 Mobile Video Experience to VMOS 4.0 Methodology
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Mobile vMOS Formula
Score
Initial Buffering
Latency
(sLoading)
Excellent
(5)100ms
Good (4) 1s
Fair (3) 3s
Poor (2) 5s
Bad (1) 10s
VideoDefinition
Maximum
Score
sQuality)
Typical
Score
Range*
5K & above 5 3.5~5.0
4K 4.9 2.6~4.8
2K 4.8 2.55~4.7
1080P 4.5 2.4~4.4
720P 4 2.1~3.9
480P 3.6 1.6~3.4
360P 2.8 1.0~2.6
ScoreStalling duration
rate (1min)
St
Excellent (5) 0%
Good (4)5%
Fair (3)10%
Poor (2)15%
Bad (1)
30%
Mobile vMOS = (sQuality, sLoading, sStalling)
sQuality = f(v_res, v_br, v_codec, v_profile)
v_res: 360p, 480p, 720p, 1080p, etc.
v_br: video bitrates (kbps)
v_codec: H.264/H.265 etc
v_profile: codec profile
sLoading = f( init_buf_latency )
Init_buf_latency: the period between cli
the start of play
sStalling = f( stalling_ratio )
Stalling_ratio: stalling duration / video p
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7/25/2019 Mobile Video Experience to VMOS 4.0 Methodology
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Video Coverage: 3 Steps for Video-Centric Network Plan
Service insight and
vMOS target setting1 3Network
solution2Gap identification and
root cause analysis
Video Insight
vMOS Evaluation & Target
50*50 Grid Visualization
vMOS Issue Demarcation
vMOS GAP Identification
Root Cause Analysis
Feature En
Carrier/Sec
New Site A
vMOS = f (sQuality, sLoading, sStalling)
vMOS
Throughput
Latenc
y
Stalling
1080p
2K
720p
Fair@720P Good @1K Excellent @2K
vMOS 3
vMOS 3.5
vMOS 4.0
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7/25/2019 Mobile Video Experience to VMOS 4.0 Methodology
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Step 1: Video Traffic and Application Insight
Video Traffic Distribution
Video Traffic(MB)100
0%
20%
40%
60%
Video Application Usage Distribution
Video Traffic
Percent (%)
28.60
%
71.40
%
Video
Other
Video Traffic Percent (%)
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7/25/2019 Mobile Video Experience to VMOS 4.0 Methodology
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240P 360P 480P 720P 1080P1440P
Step1: Example of Target Setting
Traffic % per definition
0% 50% 100%
[1,2.8]
(2.8,3.2]
(3.2,3.6]
(3.6,4]
(4,4.5]
108
720
1 2
3
Analyze video consumption habits
VoD heat map
Experience map
Definition map
Current vMOS distributio
Set 1080p vMOS=3.6 95%
as the target
0% 50% 1
(4.0,4.2]
(3.6,4.0]
(3.0,3.6]
10
2K
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7/25/2019 Mobile Video Experience to VMOS 4.0 Methodology
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Step2: Video Problem Demarcation Principle
Slow start delay
RTT
Linear buffer delay
speed
FixedUncontroll
able Controllable
Controllable
Delay
Y
Delay
X
Buffer Data BSZ
Delay
Z
APP
prepare
delay
500ms
Initial Buffer
Start Success Ratio Mapping RTT&Speed
Play stall times Mapping Speed
Initial Buffer Component
Slow start
buffer data
B_inti
Initia
0.00
0.01
RTT
Initial Buffer vs. Air Interface
0
2
4
6
8
10
0 50 100 150
34.7ms
Initial
Buffer(s)
Initial Buffer- RTT
Relationship
If initial buffer delay < 3 seconds, RTT(Air Inte
34.7ms.
For low vMOS , If RTT > 34.7ms, RAN side
Otherwise low vMOS is due to Non-RAN side p
Typ
1080
Stal
Initia
Air I
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7/25/2019 Mobile Video Experience to VMOS 4.0 Methodology
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Step 2: vMOS GAP Finding and Root Cause Anal
GAP identification by 50*50m grid
Low vMOS Area A:
Target vMOS 3.5
Actual vMOS 2
70% grid less than target
Low vMOS Area B:
Target vMOS 3.8
Actual vMOS 3
42% grid less than target
wireless resource.
Low vMOS Area C:
Target vMOS 4.2
Actual vMOS 2.8
36% grid less than target
number.
[4, 5)
[3, 4)
[2, 3)[1, 2)
< 1
coverage related
capacity related
users distribution related
vMOS Grid Number Grid Ratio
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7/25/2019 Mobile Video Experience to VMOS 4.0 Methodology
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Step3 : Network Planning and Solution
OriginalvMOS InsightFinalAf
Features
Enhancement
Multi-sector
Multi-Carrier
Macro site
Micro site
vMOS achi
Convergence
Carrier
Macro
Micro
Prioritized
Rolling Planning
vMOS: 4.8
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7/25/2019 Mobile Video Experience to VMOS 4.0 Methodology
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Summary
New standard of video experience evaluation
MethodologyResearch
Standardization Industrialization
E2E Mobile Video Solution lift video experience to vMOS 4.0
Wide-band 0 Waiting 0 Stalling Smart and Open
Video Coverage: 3 Steps for Video-Centric Network Planning
Service insight GAP Finding Network planning
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7/25/2019 Mobile Video Experience to VMOS 4.0 Methodology
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